Ticker · CUSIP 570535104

MKL

MARKEL CORP
Financial Services·Insurance - Property & Casualty
···Share
Holders (tracked)
14
Combined shares
548,289
Combined value
$1.16B
Last close
$1968.13
Quarter
2025Q4
Tracked holders · last 8 quarters
+4 vs previous quarter over the last 8.
14112024Q12025Q4
Price is -6.6% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

21 events
  1. T. Rowe Price added2026-02-17
    +514 shares · 2025Q4
    13F
  2. Ken Griffin (Citadel Advisors) opened position2026-02-17
    +97 shares · 2025Q4
    13F
  3. D.E. Shaw & Co. trimmed2026-02-17
    −290 shares · 2025Q4
    13F
  4. AQR Capital Management trimmed2026-02-17
    −83 shares · 2025Q4
    13F
  5. Wellington Management trimmed2026-02-17
    −10,942 shares · 2025Q4
    13F
  6. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −4,462 shares · 2025Q4
    13F
  7. Ray Dalio (Bridgewater Associates) opened position2026-02-13
    +2,016 shares · 2025Q4
    13F
  8. Renaissance Technologies added2026-02-12
    +4,250 shares · 2025Q4
    13F
  9. Norges Bank (Norway SWF) opened position2026-02-10
    +147,737 shares · 2025Q4
    13F
  10. Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
    −66 shares · 2025Q4
    13F
  11. Baillie Gifford & Co trimmed2026-01-23
    −8,449 shares · 2025Q4
    13F
  12. AQR Capital Management trimmed2025-11-14
    −1,925 shares · 2025Q3
    13F
  13. Izzy Englander (Millennium Mgmt) added2025-11-14
    +6,632 shares · 2025Q3
    13F
  14. D.E. Shaw & Co. trimmed2025-11-14
    −2,043 shares · 2025Q3
    13F
  15. T. Rowe Price added2025-11-14
    +668 shares · 2025Q3
    13F
  16. Wellington Management trimmed2025-11-14
    −9,116 shares · 2025Q3
    13F
  17. Renaissance Technologies trimmed2025-11-13
    −3,230 shares · 2025Q3
    13F
  18. Norges Bank (Norway SWF) exited2025-11-13
    −144,371 shares · 2025Q3
    13F
  19. Ken Fisher (Fisher Asset Mgmt) added2025-11-12
    +15 shares · 2025Q3
    13F
  20. Norges Bank (Norway SWF) trimmed2025-11-12
    −2,054 shares · 2024Q3
    13F
  21. Baillie Gifford & Co trimmed2025-10-31
    −4,737 shares · 2025Q3
    13F

Insider activity

Last 30 days
Net (open-market)
$0
Buys
0 · $0
Sells
0 · $0
Unique insiders
2
DateInsiderCodeSharesPriceValue
03-31Costanzo Brian J.
Chief Financial Officer · Officer
J2$1626.96$3.0K
03-31Crowley Andrew G.
EVP & Pres., Markel Ventures · Officer
J9$1626.96$15.0K
View full insider history for MKL →
Follow-the-investor returns
If you'd copied each holder of MKL…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2016Q1$588.96+234.2%$20.9M
Baillie Gifford & Co2016Q1$910.78+116.1%$370.9M
Wellington Management2016Q1$954.61+106.2%$220.2M
Renaissance Technologies2016Q1$1290.92+52.5%$51.2M
AQR Capital Management2016Q1$1395.42+41.0%$30.7M
Izzy Englander (Millennium Mgmt)2016Q2$1914.87+2.8%$23.9M
D.E. Shaw & Co.2016Q1$1992.72-1.2%$13.0M
D.E. Shaw & Co.2016Q1$1992.72-1.2%$13.0M
Ken Fisher (Fisher Asset Mgmt)2025Q2$2000.40-1.6%$264K
Ray Dalio (Bridgewater Associates)2020Q1$2082.54-5.5%$4.0M
Ken Griffin (Citadel Advisors)2016Q1$2147.69-8.4%$17.1M
Ken Griffin (Citadel Advisors)2016Q1$2147.69-8.4%$17.1M
Ken Griffin (Citadel Advisors)2016Q1$2147.69-8.4%$17.1M
Norges Bank (Norway SWF)2016Q1$112356.31-98.2%$290.8M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions3
Added to2
Trimmed6
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
16
$209.89B
2022Q2
18
$181.99B
2022Q3
20
$155.6M
2022Q4
18
$2.77B
2023Q1
18
$2.54B
2023Q2
15
$2.68B
2023Q3
15
$1.80B
2023Q4
13
$1.88B
2024Q1
11
$2.28B
2024Q2
17
$2.42B
2024Q3
18
$1.17B
2024Q4
13
$825.4M
2025Q1
13
$814.8M
2025Q2
13
$1.14B
2025Q3
10
$769.1M
2025Q4
14
$1.16B
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2025-11-03April McClain DelaneyBuy$1K – $15KPDF ↗
2025-08-07April McClain DelaneyBuy$1K – $15KPDF ↗
2025-07-25April McClain DelaneyBuy$1K – $15KPDF ↗
2025-07-09April McClain DelaneyBuy$1K – $15KPDF ↗
2025-06-06April McClain DelaneyBuy$1K – $15KPDF ↗
2025-05-27April McClain DelaneyBuy$1K – $15KPDF ↗
2025-05-13April McClain DelaneyBuy$1K – $15KPDF ↗
2025-05-07April McClain DelaneyBuy$1K – $15KPDF ↗
2025-04-24April McClain DelaneyBuy$1K – $15KPDF ↗
2025-04-09April McClain DelaneyBuy$1K – $15KPDF ↗
2025-03-10April McClain DelaneyBuy$1K – $15KPDF ↗
2025-03-06April McClain DelaneyBuy$1K – $15KPDF ↗

Who owns MKL

14 super-investors · 2025Q4
Tracked stake
548.3K
shares
Combined value
$1.16B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New5Added2Trim7
#ManagerSharesValue
1Baillie Gifford & Co188.4K$405M
2Norges Bank
Norway SWF
147.7K$318M
3Wellington Management111.9K$241M
4Renaissance Technologies26.0K$56M
5AQR Capital Management15.6K$34M
6Ken Griffin
Citadel Advisors
14.6K$31M
7Izzy Englander
Millennium Mgmt
12.2K$26M
8Ken Griffin
Citadel Advisors
8.7K$19M
9D.E. Shaw & Co.6.6K$14M
10D.E. Shaw & Co.3.7K$8M
11Ray Dalio
Bridgewater Associates
2.0K$4M
12Ken Fisher
Fisher Asset Mgmt
134$289K
13Ken Griffin
Citadel Advisors
97$209K
14T. Rowe Price10.6K$23K

Recent moves

20 transactions
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